Jushan Bai is Professor of Economics at Columbia University in the city of New York. He earned his Ph.D. in economics from the University of California at Berkeley in 1992. He has previously taught at Massachusetts Institute of Technology, Boston College, and New York University. He was also a visiting professor at Princeton University and University of Pennsylvania, as well as a visiting scholar at the IMF. His teaching and research field is econometrics, a subject that uses quantitative methods to analyze economic data, to test economic theory and hypothesis, and to model and forecast economic variables. He has published numerous articles in leading economics journals, such as Econometrica, Review of Economic Studies, Journal of Econometrics, Econometric Theory, and Journal of Applied Econometrics. His research projects have been supported in part by the National Science Foundation since 1994. His current research centers on panel data analysis with interactive effects, crosssectional dependence, panel unit root and cointegration, high dimensional factor models, instrumental variables estimation and selection, and methods of selecting predictors. Professor Bai has served on the editorial boards for a number of economics journals, including Econometrica. He also served as a referee for over fifty journals in economics, statistics, and political science. He has been invited to present as a keynote speaker at many international conferences.